CVE-2019-8740

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-27 · updated 2026-06-17
Weakness: CWE-787

Description

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 13.1 and iPadOS 13.1, watchOS 6, tvOS 13. An application may be able to execute arbitrary code with kernel privileges.

Affected products

Apple Ipad Os: before 13.1 — fixed in 13.1
Apple Iphone Os: before 13.1 — fixed in 13.1
Apple tvOS: before 13 — fixed in 13
Apple watchOS: before 6.0 — fixed in 6.0

How to fix

Upgrade to a fixed version: Apple Ipad Os 13.1; Apple Iphone Os 13.1; Apple tvOS 13; Apple watchOS 6.0. Check the vendor advisory for mitigations.

References

https://support.apple.com/en-us/HT210603
https://support.apple.com/en-us/HT210604
https://support.apple.com/en-us/HT210607
https://support.apple.com/en-us/HT210603
https://support.apple.com/en-us/HT210604
https://support.apple.com/en-us/HT210607

Get alerted when CVE-2019-8740 or the next vulnerability affects your stack